header{
    width: 960px;
    margin: auto;
}
.logo{
    float: left;
}
.er_code{
    float: right;
}
header dl{
    float: left;
    margin: 30px 17px 0;
}
header dt{
    font-size: 24px;
    color: #fa8100;
    font-weight: 600;
}
header dd{
    margin-top: 5px;
    font-size: 12px;
    color: #666666;
}
nav{
    background-color: #00659c;
}
nav ul{
    width: 960px;
    margin: auto;
    position: relative;
    
}
nav li{
    float: left;
    background: url(../img/bo1.png) no-repeat right center;
}
.hot{
    position: relative;
}
.hot img{
    position: absolute;
    top:6px;
    left: 68px;
}
nav li a{
    line-height: 49px;
    padding: 0 30px;
    color: #fff;
    font-size: 14px;
}
nav li:last-child{
    background: none;
}
nav li:hover{
    background-color: #004b8b;
}
.secnav{
    position: absolute;
    width: 960px;
    height: 223px;
    background-color: white;
    border: 1px solid gray;
    box-shadow: grey 2px 2px 4px;
    display: none;
    left: 0;
    z-index: 100;
}
.has_sec:hover .secnav{
    display: block;
}
.secnavlist{
    float: left;
    width: 20%;
    height: 100%;
    background: url(../img/bo4.png) no-repeat right;
    font-size: 12px;
}
.secnavlist dt{
    font-weight: 600;
    margin-left: 16px;
    margin-top: 23px;
}
.secnavlist dd{
    margin-top: 23px;
    line-height: 22px;
    margin-left: 16px;
    color: #666666;
    width: 156px;
}
.secnavlist:first-child dt,.secnavlist:first-child dd{
    margin-left: 30px;
}
.secnavlist:last-child dd{
   width: 150px;
}


